Anchoring device for brakes



Aug. 9,1921. 1,638,323

H. D. CHURCH ANCHORING DEVICE FOR BRAKES Filed Auz. 13, 1925 K Z3 Y Syvum/lolo 1 g/QM Patented Aug. 9, 1927.

' 'UNITED STATES @PATENT offence.

HAROLD D. CHURCH, 0F CLEVELAND, OHIO, ASSIGNOR T0 'GENERAL 'MOTORSVCOR- PORATION, 0F DETROIT, MICHIGAN, A CORPORATION 4OE DELAVIARE.

ANCI-IOSRING DEVICE BRAKES.

Application filed August 13, v1925. Serial No. 50,000. Y

In. 4this application I vhave disclosed an improved anchoring `means for brakes of the .type commonly uned on automobiles and in which a brake member in the form of Ia shoe yor band is adapted to be brought into engagement with a brake drum carried by-a .rotating .part7 such as a ,propeller shaft, `wheel or axle. In such brakes it is customary to provide a brake anchoring device which will prevent circumferential movement oi' the brake band but will allow radial-adjustment lthereof to vary `the clearance :between the brake .member and the drum when the brake is not applied, In my improved brake ,anchoring device I have embodied means ot' very'simple construction .for edectively locking the brake in any desired `position of radial adjustment7 this device consisting preferably of afslidable ley member engaging an adjustable stop which ldetermines the 4radial positioningot the brake member, in one position permitting free adjustment of -thestop and in the other locking it .against move ment. f

In the drawings:

Figure 1 is a side elevation of a brake in which my improvements have ,been embodied, the drum being shown in section;

Figure 2 is a section on line 2-2 of Figure 1; v

Figure 3 is a section corresponding to that shown in Figure 2 but showing the parts in dierent positions; and

Figure 4 is .a plan view of the locking plate. v

I have .shown at 2 a brake drum adapted to be secured to a rotating part such as a vehicle wheel or propeller shaft, not shown. A brake member 4 is adapted to engage the drum, the brake member here shown being of n the band type. Any preferred form of device may be used to draw the band into engagement with the drum, and I have indicated one such device by the reference character 5. 6 indicates a fixed part, in this case the usual disk carried by the rear axle housn ing, and 8 indicates a part or stud projecting outwardly over the brake band 4 and received within a loop 10-secured to the brake band. The studand loop cooperate to prevent circumferential movement of the band with respect to the drum. 12 indicates a stop having one end flattened as at 14 and having its other end threaded as at 16. This stop is adapted to be inserted through aperture 18 ,provided in the 'loop 10 and vto have ,plied ,position of the brake. A spring 20 enoircles the-stop 12fand is interposed between .the stud 8 .andthe loop 10. This spring tendslto yield-ingly vhold the loral-:e member 4 against fthe .stop but when the brake is -applied the spring is compressed thereby permitting the :entire :length Yof 'the brake member -to'engage the drum.

It is now apparent .that by turning vthe member 121th@ clearance betweenithe brake band and the brake l.drum may be varied. It is also 'obvious that it desirable to lprov-ide'locking means for :holding :the stop in .adj-usted position.

The lock-ing means which l have provided f consists of a plate 22 having a Akey-hole slot 24 therein adapted to encircle the stop, this plate being interposed between `the spring 20 and the loop 10. This lplate is ,provided with a down turned end 26 which cooperates with the loop 10 to positively limit the movement of the plate. n i

With the plate in the position shown in Figure 2 the narrow portion 28 of the keyhole slot 24 is in engagement with the flattened portion 14 of the stop 12 and the stop is thereby held against rotation. The spring 20 forcing the plate 22 against the loop 10 serves to frictionally hold the plate in adjusted position but as a further safeguard against' accidental movement of the plate, the down turned portion 26 is provided, this portion cooperating with the edge of the loop 10 to limit the sliding movement of the plate to an amount which will not allow the stop to clear the narrow'portion 28 oi' the key-hole slot.

Vhen it is desired vto adjust the kstop the plate 22 is moved to the position shown in Figure 3 wherethe stop rests in the circular portion 3() of the key-hole slot and free rotation of the stop is permitted.

I claim:

1. The combination of a brake drum, aV brake member for engagement with said drum, an anchor for said brake member, an' adjustable stop associated with said anchor and engaging said brake member, yieldable means for holding said brake member against said stop in one position of the brake, and means held in locking position by said last named means for locking said stop in adjusted position.

2. r)The combination ot a brake drum, a brake member tor engagement with said drum, an anchor it'or said brake member, an adjustable stop having threaded engagement with said ancrior, yieldable means tending to hold said member against said stop, and means adapted to engage said stop to hold the latter in adjusted position, said means being held in locking position by said yeldable means.

3. The com.I` 'nation ot a brake drum, a brake member tor engagement with said drum, an anchor tor said brake memller, an adjustable stop haring threaded engagement with said anchor, the end et said stop being` lattened, yieldable means tending to hold said member inst said stop. and a locking device comprising a member having a key hole slot therein adapted to cooperat-v with said flattened portion ot the stop in one position permittingv tree rotation ot' said stop and in another pos. on holding` the stop against movement, said member being held in selected position by said yieldable means.

4. En the structure as deiined hy claim 3, said last named member and said brake member having cooperating parts to positively lock the said last named member in one position ot adjustment.

5. The combination ot a brake drum. a brake member for engagement with the drum, a iixed part projecting outwardly over said brake member, an adjustable stop having threaded engagement with said part, a part secured to said brake member and adapted to encircle said stop, a spring encircling said stop and interposed between said parts adapted to yieldingly torce said brake member against said stop, and a slidable key lmember adapted to engage said stop and one ot said parts for holding said stop in adjusted position, said key member being interposed between said spring and one oi said parts whereby the key is held in adjusted position.

6` The combination of a brake drum, a rake band tor engagement with the drum, a loop on said brake band, a iiXed anchoring member having its end engaged in said loop tor holding the brake band against circumferential movement, a stop in said loop member having threaded engagement with said anchoring member, said stop having its outer end flattened, a plate bearing against the inner surface of said loop and having a key hole slot therein for encircling said stop, said plate having a down turned end tor engagement with said loop to limit the movement ot the plate when the stop is seated in the narrow portion ot the slot whereby the stop is held in adjusted position, and a spring interposed between the plate and the anchoring member.

ln testimony whereof I atiiX my signature.

HAROLD D. CHURCH. 

